Evaluation of gingival depigmentation efficacy with Er, Cr: YSGG and diode lasers using clinical indices DOPI, MPI and Pixel colour analysis - a split-mouth randomized clinical trial
Main Article Content
Abstract
A split-mouth clinical trial was conducted on 40 patients with gingival hyperpigmentation (DOPI ≥ 1) at Can Tho University of Medicine and Pharmacy Hospital from December 2023 to December 2025; we compared the effectiveness of gingival depigmentation between Er, Cr: YSGG laser (left side) and diode laser (right side) using DOPI, MPI, and pixel color analysis indices at 1 month and 3 months after treatment. DOPI decreased significantly in both groups at 1 month and 3 months (p < 0.001), with no significant difference between the two groups at any time point (p = 0.197 and p = 0.129). After 3 months, 66.7% of the Er, Cr: YSGG group and 77.5% of the diode group achieved DOPI <1; no case had DOPI ≥ 2. MPI and Pixelvalues improved similarly in both groups, with no statistically significant difference at any time point (p > 0.05). Both Er, Cr: YSGG laser and diode laser demonstrated comparable effectiveness in gingival depigmentation in terms of clinical indices (DOPI, MPI, and Pixel) at 1 month and 3 months after treatment.
Article Details
Keywords
Gingival hyperpigmentation, Er, Cr: YSGG laser, diode laser, DOPI, MPI, Pixel colour analysis, split-mouth design
References
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